1. Visualization and Data Mining Daniel A. Keim Professor and Head of Data Mining and Information Visualization University of Constance 78457 Konstanz, Germany keim@informatik.uni-konstanz.de

2. May 2, 20052 Comments Tight Integration of Data Mining and Visualization  Automatic Data Mining for Data Preprocessing  Using Visualization to Steer Automatic Data Analysis  Automatic Analysis Techniques for selecting the visualization Important Challenges - Business Analytics: CRM, Marketing, Finance, … - Network Analytics: Monitoring, Security, …  many involve GIS  differences to NVAC ? My Name, title and AffiliationDaniel Keim, University of Constance

3. May 2, 20053 Tight Integration Data Knowledge DM-Algorithm Result Visualization of the data Preceding Visualization Visualization of the result Data DM-Algorithm Knowledge Visualization of the result Result Subsequent Visualization Result DM-Algorithm step 1 Data Knowledge DM-Algorithm step n Visualization + Interaction Tightly integrated Visualization

4. May 2, 20054 Tightly Integrated Visualization Result DM-Algorithm step 1 Data Knowledge DM-Algorithm step n Visualization + Interaction Visualization of algorithmic decisions  Data and patterns are better understood  User can make decisions based on perception  User can make decisions based on domain knowledge  Visualization of result enables user specified feedback for next algorithmic run

5. May 2, 20055 Visual Classification [AEK 00]  Each attribute is sorted and visualized separately  Each attribute value is mapped onto a unique pixel  The color of a pixel is determined by the class label of the object  The order is reflected by the arrangement of the pixels... attr. 1 class 0.2 Y 0.3 Y Y 0.5 N 1.1 Y... attr. 2class 0.5N 1.3Y 2.0N 2.5Y 5.1N... attr.1attr.2...class 0.323.3...Y 2.42.0...N

6. May 2, 20056 Visual Classification age < 35 G P V Salary G < 40 > 80 [40,80] A New Visualization of a Decision Tree

7. May 2, 20057 Example of Tight Integration: Visual Classification Level 1 Level 2... Level 18 leaf split point inherited split point

8. Geo-related information: Learning from History

9. May 2, 20059 Computer generated Cartograms Presidential Election 2000 Results Bush – Gore

10. May 2, 200510 Rectangular Cartograms: 2004 Election Results